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Finding the Fourth Proportional to 539.13, 743.99 and 306.30

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Solution

The fourth proportional to 539.13, 743.99 and 306.30 is: 422.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.13 : 743.99 = 306.30 : x
  2. Step 2: Convert to fraction form
    539.13/743.99 = 306.30/x
  3. Step 3: Cross multiply
    539.13x = 743.99 × 306.30
  4. Step 4: Simplify right side
    539.13x = 227,881.18
  5. Step 5: Solve for x
    x = 227,881.18/539.13
  6. Step 6: Final answer
    x = 422.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.